TSB 07-08-98

Diesel Engine Overheating

NOTE: THIS INFORMATION APPLIES TO VEHICLES EQUIPPED WITH A 24 VALVE CUMMINS
DIESEL ENGINE WITH AN ENGINE SERIAL NUMBER (ESN) 56512007 OR PRIOR.

Symptom/Condition:

Some vehicles may overheat or run hotter than normal. In
some cases DTC P0217 - DECREASED ENGINE PERFORMANCE DUE TO ENGINE OVERHEAT may
be set.

Diagnosis:

If a vehicle is brought in for an overheat condition, check the ESN to
determine if the engine falls within the build range. If it DOES NOT, continue
with normal cooling system diagnosis. If it DOES fall within the range, perform
the repair procedure.

Parts Required:

1 05015090AA thermostat

Repair:

This bulletin involves replacing the thermostat with a revised part.

1. Replace the thermostat with p/n 05015090AA following all service manual
Cautions, Warnings, and procedures.